I gotta admit that the game has it's fair share of bugs, but at the least, I haven't got into any show stopping bugs, just wierd and bizarre. The bug showed in that video looks creepy as hell, it looks one of those guys from Silent Hill 4, I didn't encounter that bug, or any of this kind, yet.
Steam is updating the game as I write this, it's a pretty big update, compared to the size of the updates FO3 had, it's like 3 or 4 times bigger than the latest FO3 patch. I hope this won't ruin my saves and makes the game more stable and less buggy.